Fluorescence of nanocomposite materials with hydroxyl-functionalised ionic liquid confined into mesoporous silica gel
by Juan Zhang; Juan Yuan; Jing Yang; Qiujuan Ma
International Journal of Nanomanufacturing (IJNM), Vol. 9, No. 3/4, 2013

Abstract: Nanocomposite materials (IL-sg) of hydroxyl-functionalised ionic liquid 1-hydroxyethyl-3-methlyimidazolium dicyanamide E_OHMImN(CN)₂ physically confined into mesoporous silica gel are synthesised according to a proper sol-gel process. The silica gel has disordered wormhole-like pore structure and average pore diameter of 3.3-6.2 nm. The materials exhibit notably enhanced fluorescence emissions compared with pure IL. The hydroxyl group on the cation of IL has an obvious effect on the fluorescence emissions of pure IL and the materials, i.e. the emission intensity of pure E_OHMImN(CN)₂ is c.a. 1.8 times stronger than that of pure IL 1-ethyl-3-methlyimidazolium dicyanamide EMImN(CN)₂, however, the emission intensity of E_OHMImN(CN)₂-sg is c.a. two times weaker than that of EMImN(CN)₂-sg.

Online publication date: Mon, 31-Mar-2014

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